Incandescent lamp.



N0. 830,598. PATENTED SEPT. 11, 1906. G. KLUMPP 6a H. P. HERMAN.

INCANDESGBNT LAMB. ArPLmATIoN FILED SEPT. 9. 1905.

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6- NVNTOHS Y e /V' l gerlzan/ No. 830,598. PATENTED SEPT. 11, 1906. G. KLUMPP & H. F. HERMAN.

INCANDBSCENT LAMP.

APPLIOATIox FILED snrT.9.1eo5.

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UNITED STATES y PATENT (')FFIOHL GOTTLOB KLUM'PP ANI) HENRY FELIX HERMAN OF BROOKLYN, NEW

V YORK; SAID HERMAN ASSIGNOR TO SAID KLUMPP.

INCANDESCENT LAMP.

spcification of Letters Patent.

Patented Sept. 11, 1906.

To all whom it mln, concern.-

Beit known that we, GoT'rLoB KLUMPP, a subject of the German Emperor, and HENRY FELIX 'HERMAN, a citizen of the United States, residents of Brooklyn, in the countyv of Kings and State of New York, have invented a new and useful Improvement in Incandescent Lamps, of which the following is a specification.

This invention relates to certain new and useful improvements in incandescent electric lamps, and has articular reference to that class in which a light of varied intensity may be obtained and to what is commonly known upon the market as high and low.

The objects of the invention are to provide a cheap, simple, and durable construction in which only one contact and one filament is employed, together with certain means which are arranged for engaging with the contact and b v the adjustment of which a lightof varied intensity may be obtained or the light entirely extinguished, as occasion may necessitate.

Further objects of the invention are to provide a construction capable of attachment to the ordinary make of sockets, one in which the light may be raised or lowered or completely cut ofi by manipulating the globe, and also one that will be neat in appearance and of such design that its connection to the socket will not interfere with the attachment of the ordinary construction of globes or shades.

With these briefly-stated objects in view the invention comprises certain details of construction and peculiar combinations and arrangement of parts, as will be fully described in the followlng specification and ointed out in the claims,` reference being ha to the drawings, in which- Figure 1 is a perspective view of my improvement, showing a lamp applied thereto.

ig. 2 is an enlargedvertical sectional view of the same, the lamp being shown in elevation. Fig. 3 is an enlar ed horizontal sectional view drawn on the ine 3 3 of Fig. 2 and looking in the direction indicated by the arrow. Fig. 4 is a similarV view drawn on the line 4 4 of Fig. 2 and showing the trolley mem- Fig. 5 is a section on the line 5 5 of Fig. 2,. Fig. 6 is a detail perspective view of the bridge. Fig. 7 is' a detail perspective view of the disk. Figs. 8 and 9 are detail pers ective views of the trolley member, and Fig. 10 is a detail plan view of the blank form from which the trolley member is made, and Fig. 11 is a detail perspective view of the sprin contact-plate.

In the drawings, designates the plug com rising an outer threaded sleeve A in whic fits a threaded U-shaped member A', whichI shall hereinafter refer to as a brid e. Against the top of the bridge it fitted a ber disk A, whose periphery is surrounded by the upper edge of the sleeve, which also extends over the edge of the disk, as shown most clearly in Fig. 2 of the drawings. At the lower end of the plug is held a pair of clampin -disks B and B of fiber or other non-con ucting material, between which is clam ed the top plate C of the shell or casing C', w 'ch incloses the operating arts of the device, as will be fully explained ater on.

A rod or post D passes through the lug and disks and serves to securely lock t em together, the said rod having a nut threaded upgn its upper end which rests against the fi r disk Aa and is adapted to engage the usual springfinger of the socket. Upon the lower end o the rod or post is held a plate or disk E of slate or other non-conductlng Inaterial, which is held adjacent the lower clamping-disk B and spaced therefrom b a fiber washer D. U on its lower face an near its periphery the p ate or disk E is provided with a circular groove E', in which is placed and heldn a strip E2 of any suitably high resistance material. This strip extends around the groove for the greater portion of its length; but the ends are spaced somedistance a art, so that an open space is provided, so t at the wheel may be entirely disengaged from the stri and the current cut off. One end of the strip Ez is engaged by a plate G', to which is connected a conductor-post G, which extends up through the plate or disk E andl clamping-disks B and B into the socket and has its u per end connected to a foot portion a of the bridge A2.

The casing'or shell C is connected to the plate C in any suitable manner and its lower end is bent inwardly for a short distance to provide a flange C, the"l inner edge of which rests within a oove or raceway formed between collars and H', which are threaded upon a socket I, into which the base J of the lamp J is screwed. This arrangement se- IOO IOS

l rial, that are clam ed above and be ow the head of the socket y a screw-post M, havin a head upon its lower end and a nutthreade upon its upiper end and between which the y'forms a contact and is design washers an trolley member are clamped to the socket I. The post M is enga ed at its lower end by the contact-plate J3 o the lamp and at its upper end by a s ring contactplate N, securely held upon 'tlie post D between' its head. and the lower face of the disk E. The trolley member is of a peculiar construction and is formed of a single ieee of` spring metal bent to provide a base from which pro'ects an arm K, whose extreme end is reduce .in width and bent downwardly and upwardly, as shown at K, to provide vertical portions which form bearin s for a shaft u pon which is held a trolleyeel K, that Y for eng ement with the late or disk E and stripaz carried within t e oove E. l The central ortios of the base and arm Kof the troley member is cut out, providing an opening throu h which the contact-plate N and the post maypass, and these openin s are of the size to prevent engagement by either the plate or post.

When the various arts are assembled, as shown in Fig. 2 of t e drawings, it will be readily understood that the current from-one of the line-wires will pass down the post D, through the contact-plate N, the post M, to the contact-plate Js of the lamp, through the iilaments of the lamp, and thence u through the socket I, trolley member K, tro ey-wheel' K, thestri of high-resistance material E, post G, bri ge A', and finally through the sleeve A, thus forming a complete circuit.

It is well known that in the use of any highresistance material for conducting a current of electricity the farther one oint of contact is arranged .from the ot er .point the weaker or lighter the current will be, likewise 'thenearer one point of contact is arranged to `the opposite point of contact the stronger the current will be. This same principle is'carried out in .the construction of my device by the use of the strip of high-resistance material, and it will therefore be readily seen that the farther the trolley K is moved from the ost G the weaker will be the current whiclli is conducted to the filament, and therefore the dimmer will be the rays of light emittingtherefrom. l

. In the operation-'of In device it will bev seen 'that b simpl .-'revo vin the bulb axially the soc et an trolley' lalso turn and cause the Wheel K to be moved around the siirliice of the strip E, and should a bright light be desired the trolley' is iiioved until it is arranged immediately adljacent the postl l pass through G, when a direct current wi the various parts; but should lthe bulb be turned so that the trolley-Wheel will be held bulb the light maybe raised or lowered or completely cut oil, and by the arrangement of the trolley' and its sup ort and the manner of holding the socket an its connected parts the socket may be easily reto the casin volved and te trolley readily' moved around the strip E, the light adjusted gradually, and the jumps common in devices of a similar character are positively avoided. Of course it will be understood that should it be desired to lower or completely turn the light vout after it has been burning at its hi hest for any length of time and the bulb s ould become hot lit may be readily accomplished by catchi hold of the collar H', and by sim 1y revo ving it the socket audits connecte arts be easily revolved the same as i the ma bulb was operated.

' Having thus fullydescribed our invention, what we claim as new, and desire to secure by Letters Patent, is

1. A device of the kind described compris-i in a contact-strip of high resistance, a rotata le lamp-socket, an electric circuit including said contact-stri and a contact carried by the socket and a apted lto travel upon the said contact-strip, said contact being also in the circuit.

2. A device of the kind described, a contact-strip, a rotatable lamp-socket, an electric circuit including said contact-strip, and a wheel carried by the socket and ada ted to travel upon the contact-strip, said w eel being also inthe circuit- 3. A device of the kind described, comprising a disk of insulating material, a ath formed of a conducting materialy of hig resistance arranged upon said disk, a rotatable lamp socket, means for holding the said socket adjacent the disk, and a wheel carried by the socket and adapted to travel upon the path of the conducting material when the socket is rotated.

4. A device of the kind described, comprising a contact-strip having a high resistance, the `ends of the strip being insulated from each other, an Aelectrical circuit connecting with one end of said stri a rotatable lamp-4 socket, a'trolley carried y the lamp-socket,

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and a trolley-wheel carried by the trolley and adapted to travel upon the contact-strip and the insulating material and to move toward or aWay from the electrically-connected end of the contact-strip When the lamp-socket is rotated.

5. A device of the kind described, comprising a disk of insulating material, a non-continuous l,contact-strip arranged upon said disk, a conductor-post passing through the disk and engaging an end portion of the contact-strip, a rotatable lamp-socket, a springmetal trolley carried by the socket and a wheel carried by the trolley adapted to travel in a path including the contact-strip.

6. A device of the kind described, comprising a plate of insulating material, a divided contact-strip substantially circular in form and ot' high resistance embedded in one face of said plate, means for rotatably holding a lamp-socket adjacent the said plate, a lampsocket rotatably held by said means, a trolley carried by the lamp-socket and a Wheel carried by the trolley and adapted to travel upon the contact-strip and plate when the lamp-socket is rotated.

7. A device of the kind described, comprising a plate of non-conducting material, a comluctor passing through said plate, a strip of contacting material of high resistance carried by the plate, a conductor-post passing through the said plate and in contact with an end of said strip, a lamp-socket rotatably held adjacent the plate, means for electrically connecting the said socket with the conductor first mentioned, and a spring-pressed trolleywheel carried by the socket and included in the circuit, said trolley-Wheel being adapted to rest upon the contact-strip and upon the plate between the ends of the strip and to travel from the free end of the strip to a point adjacent the second mentioned conductorpost.

S. The combination with a rotatable lampsocket, of a plate oi non-conducting material, a contact-strip carried by said plate, a trolley carried by the lamp-socket, said trolley being formed of spring metal bent to provide a base adapted to rest upon the lamp-socket and having a spring-arm integral with the base, the extreme end of the arm being bent downwardly and upwardly to form a bearing and a trolley-wheel held in said bearing and adapted to travel upon the plate and contact-Strip.

GOTTLOB KLUMPP. HENRY FELIX HERMAN,

Witnesses:

JOHN M. HoTHERsALL, GEORGE F. WALTER. 

